用Python中的新行替换空格

Question

I'm trying to replace '\\s' with '\\n', but when I print line2 , it doesn't print a line with the spaces replaced with new lines. Could anybody indicate what's wrong with my syntax?

for line in fi:
    if searchString in line:
        line2 = line.replace('\s' , '\n') 
        print line2

Answer 1

.replace() replaces strings, you want re.sub(..) , eg:

for line in fi:
    if searchString in line:
        line2 = re.sub(r'\s' , '\n', line) 
        print line2

The documentation has more details: https://docs.python.org/2/library/re.html#re.sub

Answer 2

\\s is a Regex token, won't be understood by str.replace .

Do:

line.replace(' ', '\n')